Pos Neg Homework

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Algebraic

Expressions

and Formulas

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Find the value of each algebraic expression. 1. x+9 when x=-4

-

~

5n when n=4

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3.

4.

~ whenx=35

f wheny=-18

1-

-~

xy when x = -2, y=4

mn when m = -3, n=-2

G 6x-12 whenx= 2

r-r ab -

}3'

t when a = 6 '(

/0

4x+

f when x=-9

a

b when a =-10, b=-2 ~

uvwhen u=4, v=-2

~6 25 -xywhen

3(x + 7) when x = 2

~

Q

cJ

x= 4, y=3

13 J + 3c - 2d when

b=2

).~

c = 8,

d=4

- ~c7 -4(y- 5) wheny= 3

0,

v 8.

2

3swhens= 24

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5. 12 + Sa when a = 9

7.

Lj

7rwhen r=-2

-~

6.

Z+ (-5) when Z= 9

-i

~

2.

y-12 wheny= 3

2x2+ 3x when x = 3

a2+ b2when a = 6, b=8

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too

I~ 7(a - b) when a = 2, b=3

-l3(c- d)2 + 2cwhen c= 9, d=8

9-1